这类波可以像光波一样被反射、折射和偏振。

I like to be a free spirit. Some don’t like that, but that’s the way I am.

穷人并不懒惰；他们只是被困在一个让他们很难摆脱贫困的系统中。

Innovation is not about saying yes to everything. It's about saying no to all but the most crucial features.

Now some advantages particular to this age are not to be denied. Boredom seems to have been vanquished. There is always something to do, but hasn’t this translated into a perpetual distraction in our lives.